- Based on mitigation and adaptation viewpoint in water sensitive city- A case study in serious land subsidence area in Yunlin, Taiwan   2045 kb by    Chang, Hsueh-Sheng & Chen, Tzu-Ling | changhs@mail.ncku.edu.tw    Short Outline A coupling model of urban water balance on land use change can analyze the relationship between land use development, anthropogenic activities and water cycling, and further simulate different scenarios to propose appropriate land use patterns while achieving water safety, water satisfaction, and water environment communities. Abstract Global climate changes has speed up and strengthen disasters frequencies and scale, such as tsunami in Southeast Asia in 2004 and Japan in 2011. Excessive urbanization, unbalanced water usage, and land use out of control result in serious planning failures. In fact, urban development changes land-use coverage directly which affects overall water cycling and eventually leads to flood disaster. Hence, international organizations, both European Union Framework Programme (EUFP) and World Meteorological Organization (WMP) started to integrate water adaptation approach, water cycle concept and water balance in land use plans. A thorough consideration of water balance and spatial planning might become significant urban flood mitigation strategy (WMO, 2010). Owing to the geographic features and climate condition, Yunlin County undertakes food provisions responsibility in Taiwan. For quite some time, the excess ground water withdrawn led serious land subsidence inland coupling sea level rising under global climate change result in flood disasters and saltwater intrusion, which affected local residents’ lives and property critically. It is necessary to integrate both specialties of land use planning and water balance to construct as environment, “living with water.” We propose to apply water balance concept into a water sensitive city like Taiwan Yunlin, and further construct water safety (without flood), water satisfaction (reasonable ground water withdrawn), and water environment communities. Previous studies have already explored water balance and land use coverage change and further responded to flood issues. The concept of water balance can be divided into three categories. The 1st category discusses the driving forces of land resource and land use change pressure imbalanced water cycling mechanism, such as precipitation, evapotranspiration, runoff, infiltration etc.(Emmerling and Udelhoven, 2002; Collin and Melloul, 2003; Deal and Schunk, 2004; Haase et al., 2007; 2009). The 2nd category emphasize the sum of water cycling management in different land uses, such as drinking water, rainwater, waste water (Pauleit et al., 2000, 2005). The 3rd category analyze seasonal distribution balance between water and energy (Oke, 1978; Grimmond, 1986; Mitchell, 2004, 2008). There were various research discussed water balance and land use change simulation, such as Sivapalan (1996), Guo (2002), Bormann (2006), Krause (2007) etc. Sivapalan (1996) used water balance model to predict potential impacts on hydrologic cycle of deforestation in Australia basin. Guo (2002) integrated water balance to discuss hydrology and water sensitivity in each grid based on global climate change point of view. Bormann (2006) used water balance model to evaluate the effects of three different land use plans. Different models and applications proposed in previous studies such as Markov Chain Model, Cellular automatic Method, Logistic Regression, Artificial Neural Network (McColl and Aggett, 2007；Liu and Seto, 2008； Kamusoko et al., 2009；Shen et al., 2009) provide abundant references. A coupling model of urban water balance on land use change can analyze the relationship between land use development, anthropogenic activities and water cycling, and further simulate different scenarios to propose appropriate land use patterns while achieving water safety, water satisfaction, and water environment communities. This study will first build up water balance model based on precipitation, evapotranspiration, runoff, infiltration on different land uses which fits to Taiwan. And then, we will then propose appropriate land use management while simulating land use change under water balance model. Ultimately, the water balance model can be used for water sensitive city like Yunlin, Taiwan to practice water balance. Keywords Case Study presented on the ISOCARP Congress 2013: Frontiers of Planning - Evolving and declining models of city planning practice   Click to open the full paper as pdf document   Click to send an email to the author(s) of this paper